Other Identifiable Intangible Assets (Details) - USD ($)		1 Months Ended		3 Months Ended		9 Months Ended
	Nov. 29, 2012	Jan. 31, 2020	May 31, 2016	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets				$ 147,000	$ 382,000	$ 441,000	$ 1,148,000
McMahon Leasing [Member]
Finite-Lived Intangible Assets [Line Items]
Acquisition purchase price		$ 4,600,000
Fair Value Of Leases Acquired, Premium		453,000
Excess consideration issued over book value		1,500,000
Finite-Lived Intangible Assets, Net		285,000
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months		57,000
Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year		57,000
Finite-Lived Intangible Assets, Amortization Expense, Year Five		57,000
Finite-Lived Intangible Assets, Amortization Expense, Year Four		57,000
Finite-Lived Intangible Assets, Amortization Expense, Year Three		$ 57,000
Inventory Adjustments				100,000		100,000
Acquired Loans Outstanding, Eliminated From Transaction				4,000,000.0		4,000,000.0
Liabilities acquired				4,400,000		4,400,000
Internal Use Software [Member]
Finite-Lived Intangible Assets [Line Items]
Acquisition date	Nov. 29, 2012
Acquisition purchase price	$ 1,800,000
Finite-Lived Intangible Assets, Remaining Amortization Period	8 years
Amortization of intangible assets per year	$ 217,000
Amortization of intangible assets over five years	$ 16,000
Gross intangible assets				1,800,000		1,800,000
Accumulated amortization				1,800,000		1,800,000		$ 1,700,000
Customer List Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Acquisition purchase price			$ 60,000,000.0
Finite-Lived Intangible Assets, Remaining Amortization Period			10 years
Amortization of intangible assets over five years						1,700,000
Gross intangible assets			$ 3,400,000	3,400,000		3,400,000		3,400,000
Accumulated amortization				1,500,000		1,500,000		$ 1,200,000
Amortization of intangible assets						340,000
Customer List Intangibles [Member] | McMahon Leasing [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life		12 years
Excess consideration issued over book value		$ 1,500,000
Gross intangible assets		689,000		689,000		689,000
Accumulated amortization				43,000		43,000
Lease Agreements [Member] | McMahon Leasing [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired finite-lived intangible assets		9,900,000
Automobile Inventory And Other Assets [Member] | McMahon Leasing [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired finite-lived intangible assets		$ 958,000
Trade Names [Member] | McMahon Leasing [Member]
Finite-Lived Intangible Assets [Line Items]
Gross intangible assets				$ 135,000		$ 135,000